Littelfuse 0473005.YRT1 Equivalent & Substitute Parts

Part Overview

The Littelfuse 0473005.YRT1 is a 5 A, 125 V AC/DC board mount axial fuse from the PICO® II 473 series. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The fuse is designed for through-hole mounting applications requiring slow-blow response characteristics and is suitable for circuits operating across -55°C to 125°C temperature ranges.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Response Time	Slow Blow
Mounting Type	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)
Package / Case	Axial
Breaking Capacity @ Rated Voltage	50 A
Melting I²t	54.8
Size / Dimension	0.135" Dia x 0.280" L (3.43mm x 7.11mm)
DC Cold Resistance	0.0133 Ohms
Operating Temperature Range	-55°C ~ 125°C
Approval Agency	CSA, PSE, UR

Substitute Part Grouping Explanation

Substitution of the obsolete 0473005.YRT1 is based on electrical and mechanical parameter equivalence within the PICO® II 473 series. All substitute parts maintain identical specifications across the following critical parameters:

Current Rating: 5 A
Voltage Rating: 125 V AC / 125 V DC
Response Time: Slow Blow
Breaking Capacity: 50 A
Melting I²t: 54.8
Physical Dimensions: 0.135" Dia x 0.280" L (3.43mm x 7.11mm)
DC Cold Resistance: 0.0133 Ohms
Mounting Type: Through Hole Axial
Approval Agencies: CSA, PSE, UR

Substitute parts differ only in packaging format (Cut Tape, Tape & Reel) and product status (Active vs. Obsolete). All active substitutes are RoHS3 compliant and REACH unaffected, whereas the original part is RoHS non-compliant.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage AC/DC	Response Time	Breaking Capacity	Melting I²t	Dimensions	DC Resistance	Product Status	Packaging	RoHS Status	Inventory
0473005.YRT1	Littelfuse Inc.	PICO® II 473	5 A	125 V / 125 V	Slow Blow	50 A	54.8	0.135" x 0.280"	0.0133 Ω	Obsolete	-	RoHS Non-Compliant	1059 Pcs
0473005.MRT1L	Littelfuse Inc.	PICO® II 473	5 A	125 V / 125 V	Slow Blow	50 A	54.8	0.135" x 0.280"	0.0133 Ω	Active	Cut Tape (CT)	RoHS3 Compliant	5122 Pcs
0473005.MAT1L	Littelfuse Inc.	PICO® II 473	5 A	125 V / 125 V	Slow Blow	50 A	54.8	0.135" x 0.280"	0.0133 Ω	Active	Cut Tape (CT)	RoHS3 Compliant	2823 Pcs
0473005.PF002L	Littelfuse Inc.	PICO® II 473	5 A	125 V / 125 V	Slow Blow	50 A	54.8	0.135" x 0.280"	0.0133 Ω	Active	Tape & Reel (TR)	RoHS3 Compliant	900 Pcs
0473005.PF003L	Littelfuse Inc.	PICO® II 473	5 A	125 V / 125 V	Slow Blow	50 A	54.8	0.135" x 0.280"	0.0133 Ω	Active	Tape & Reel (TR)	RoHS3 Compliant	1102 Pcs
0473005.YRT1L	Littelfuse Inc.	PICO® II 473	5 A	125 V / 125 V	Slow Blow	50 A	54.8	0.135" x 0.280"	0.0133 Ω	Active	Cut Tape (CT)	RoHS3 Compliant	40400 Pcs

Engineering Selection Recommendations

All substitute parts are electrically and mechanically equivalent to the original 0473005.YRT1. Selection among active alternatives should be based on the following criteria:

Product Status: All substitute parts carry Active status, ensuring continued manufacturer support and long-term availability, unlike the obsolete original part.

Compliance: All substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant.

Packaging Considerations: Cut Tape (CT) packaging is suitable for manual assembly and small-volume production runs. Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly and high-volume manufacturing.

Inventory Availability: 0473005.YRT1L offers the highest stock level (40,400 Pcs), providing supply chain stability. 0473005.MRT1L (5,122 Pcs) and 0473005.MAT1L (2,823 Pcs) provide alternative Cut Tape options. 0473005.PF003L (1,102 Pcs) and 0473005.PF002L (900 Pcs) are available in Tape & Reel format.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0473005.YRT1 with any of the listed substitutes?

A: Yes. All substitute parts maintain identical electrical and mechanical specifications, including current rating, voltage rating, response time, breaking capacity, physical dimensions, and resistance characteristics. Substitution is valid from an engineering standpoint.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for manual assembly and small-quantity applications. Tape & Reel (TR) packaging supplies components on continuous reels optimized for automated assembly equipment. Both formats contain electrically identical components.

Q: Why is the original part marked as obsolete?

A: The 0473005.YRT1 is classified as obsolete, indicating the manufacturer has discontinued active production and support. Active substitute parts from the same PICO® II 473 series provide equivalent functionality with ongoing manufacturer support.

Q: Are there any compliance differences between the original and substitute parts?

A: Yes. The original 0473005.YRT1 is RoHS non-compliant. All substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental regulations required for new designs and procurement.

Q: Which substitute part should I select for new designs?

A: For new designs, select from active parts based on your assembly process: 0473005.YRT1L for Cut Tape applications with highest availability, or 0473005.PF003L / 0473005.PF002L for Tape & Reel automated assembly. All are electrically and mechanically equivalent.

Q: Do all substitutes carry the same certifications?

A: Yes. All parts, including the original, are certified by CSA, PSE, and UR approval agencies. Certification coverage is identical across all listed parts.

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